@MissyInbetween sent me a suggestion where Louis flips a coin and it leads him to Harry. During a drunken night out with his best friends Liam and Niall, Louis makes a bet. He's absolutely certain that his soulmate is out there waiting for him and destiny will make sure that they will meet eventually. Liam and Niall suggest that he will help destiny on the way by flipping a coin to make his decisions for him.